The Official Cannabis Independent strain guides
GSC No 19 Shop
The Strain Deck · Nine of DiamondsNo 19 · GSCgscstrain.com
Girl Scout Cookies stamp, No. 19 in the Official Cannabis collection: a bitten cookie on red

Catalogue entry · lab-tested · every claim cited

GSC (Girl Scout Cookies)

GSC, also known as Girl Scout Cookies, is a hybrid attributed to California breeder Jigga and usually described as an OG Kush × F1 Durb cross. The F1 Durb name is important: sources disagree whether its “Durb” was Durban Poison, so this guide treats that connection as unresolved.1,2,3

Updated 567 lab tests 10 sources

Design
A bitten cookie on red · No 19 in the collection
In the Strain Deck
Nine of Diamonds · Dessert suit
Also known as
Girl Scout Cookies; Cookies on Leafly.1
Type
Hybrid; source labels disagree about the lean.1,3,4
Primary lineage account
OG Kush × F1 Durb in the primary account; the Durban Poison connection is disputed.1,2,3
State-lab result
median total THC of 19.72% across 567 state lab tests of GSC flower, with the middle half of results between 17.80% and 21.92%.5
Lab coverage
567 tests from 10 states, dated 2014–2024.5

The guide one plate per section

Plate I

Genetics

The sourced GSC lineage: OG Kush, F1 Durb, the disputed Durban Poison link, cuts and documented descendants.

Plate II

THC & terpenes

GSC state-lab THC distribution, terpene data, published source claims and sampling limits.

Plate III

Effects

What Leafly and Weedmaps user-report summaries list for GSC, plus lab terpene findings and variation caveats.

Plate IV

Grow

Published GSC flowering panels, version caveats and a concise federal seed-definition note.

Plate V

Where to find it

A dated, market-by-market GSC flower availability snapshot when Weedmaps data is available.

Plate VI

History

A sourced account of GSC’s Bay Area origin story, Forum Cut spread, awards, descendants and disputed ancestry.

Quick answers

What strain is GSC?

A cannabis hybrid also called Girl Scout Cookies. Leafly attributes it to Jigga’s OG Kush × F1 Durb cross; Weedmaps describes OG Kush with the breeder’s F1 Durban Poison. The source accounts overlap but are not identical.1,3

Is GSC indica or sativa?

Hybrid is the consistent answer. Leafly describes it as indica-dominant, Weedmaps as sativa-leaning, and AllBud labels it 60% indica / 40% sativa; those are source labels, not a lab measurement.1,3,4

How strong is GSC in the lab data?

GSC has a median total THC of 19.72% across 567 state lab tests of GSC flower, with the middle half of results between 17.80% and 21.92%. Published figures vary, which is why the guide separates source claims from tested batches.1,3,4,5

Is GSC the same as Forum Cookies or Thin Mint?

No. Leafly calls Forum Cut Cookies an original GSC cutting and calls Thin Mint a GSC variation; the guide treats both as related versions rather than plain-GSC aliases.1,6

How strong GSC tests

19.72%median total THC
17.80%–21.92%middle half of tests
567lab tests, 10 states
36testing labs

THC in 567 lab tests of GSC flower

0 20 40 60 80 6–7% THC: 0 tests 7–8% THC: 1 tests 8–9% THC: 4 tests 9–10% THC: 2 tests 10–11% THC: 3 tests 11–12% THC: 3 tests 12–13% THC: 7 tests 13–14% THC: 12 tests 14–15% THC: 12 tests 15–16% THC: 20 tests 16–17% THC: 39 tests 17–18% THC: 51 tests 18–19% THC: 71 tests 19–20% THC: 80 tests 20–21% THC: 69 tests 21–22% THC: 52 tests 22–23% THC: 46 tests 23–24% THC: 33 tests 24–25% THC: 20 tests 25–26% THC: 18 tests 26–27% THC: 11 tests 27–28% THC: 4 tests 28–29% THC: 3 tests 29–30% THC: 2 tests 30–31% THC: 0 tests 31–32% THC: 2 tests 32–33% THC: 0 tests 33–34% THC: 0 tests 8%12%16%20%24%28%32% median 19.72% Total THC, % by weight
Each bar counts tests in a one-point THC band; the shaded band is the middle half of results. 567 tests of GSC flower from 10 states, 2014–2024.5

Full lab data: by year, by state, terpenes and the downloadable dataset →

From the lab report

  • Terpene results for GSC: β-caryophyllene led 90% of tests, while limonene led 6.3%.5
  • The THC tail narrowed fast for GSC: the at-or-above share was 46% at 20% total THC, 7.2% at 25% and 0.5% at 30%.5
  • 58% of Maryland tests met or exceeded 20% total THC, compared with 22% in Nevada.5

Read the full GSC lab report →

What the records show

The state-lab data contains 567 matched GSC flower tests across 10 states. The result is median total THC of 19.72% across 567 state lab tests of GSC flower, with the middle half of results between 17.80% and 21.92%; it describes batches sold under the matched name, not an immutable standard for every plant or product carrying a similar label.5

Leafly’s product-facing page lists 25% THC, Weedmaps gives 18–28%, and AllBud lists 28%. The different published claims are a reason to look at the distribution in the lab data rather than pick one advertised figure as definitive.1,3,4

GSC next to similar strains

Lab-tested THC: GSC and the 6 strains on our comparison pages

16% 20% 24% 28% GMO Cookies GMO Cookies: median 26.74%, middle half 23.46%–29.83%, 2,159 tests 26.7% n=2,159 Gelato Gelato: median 21.58%, middle half 18.91%–24.70%, 1,792 tests 21.6% n=1,792 OG Kush OG Kush: median 20.87%, middle half 18.06%–23.36%, 379 tests 20.9% n=379 Blue Dream Blue Dream: median 19.96%, middle half 17.62%–22.37%, 2,118 tests 20.0% n=2,118 GSC GSC: median 19.72%, middle half 17.80%–21.92%, 567 tests 19.7% n=567 Durban Poison Durban Poison: median 19.45%, middle half 17.33%–21.99%, 528 tests 19.4% n=528 Forum Cookies Forum Cookies: median 18.75%, middle half 15.71%–21.20%, 81 tests 18.8% n=81 Median total THC (dot) and middle half of tests (bar)
Same state lab dataset and matching rules for every strain.5 See the comparisons.

Where it is sold

MarketStoresMenu itemsMedian eighth
Los Angeles, CA 71 136 $17.50 (n=51)
New York, NY 54 80 $32.00 (n=41)
Newark, NJ 11 12 $48.75 (n=8)
Oklahoma City, OK 8 8 $18.00 (n=1)
Boston, MA 5 9 $45.00 (n=5)
Detroit, MI 5 6 $15.00 (n=3)

Stores within 50 miles listing GSC flower on Weedmaps, Oct 5, 2026.7

All 27 markets, Germany and how we counted →

Genetics at a glance

Family tree

  • OG KushLeafly and Weedmaps place an OG Kush type/cut on the GSC parent side.
  • F1 DurbLeafly names F1 Durb; the relationship of its “Durb” name to Durban Poison is contested.

GSC

  • Sunset SherbertLeafly’s GSC genetics panel lists it as a child.
  • GelatoLeafly says Gelato is Sunset Sherbet × Thin Mint Girl Scout Cookies.
  • GMO CookiesLeafly says GMO Cookies is GSC × Chemdawg.
The tree uses the documented OG Kush × F1 Durb account and labels the F1 Durb / Durban Poison question as disputed.1,2,3,8,9,10

See the parents, cuts, disputes and documented descendants in the GSC genetics guide. →

The issue printed on demand, nothing on sale yet

The whole issue →

Sources

  1. Leafly, GSC aka Girl Scout Cookies strain information. Accessed Oct 5, 2026.
  2. Leafly, Just desserts: the Cookies and Cakes family genealogy (David Downs) (2021-04-15). Accessed Oct 5, 2026.
  3. Weedmaps, GSC strain page. Accessed Oct 5, 2026.
  4. AllBud, Girl Scout Cookies marijuana strain information and reviews. Accessed Oct 5, 2026.
  5. Cannlytics (CC BY 4.0), cannabis_results: public state lab results (filtered and aggregated by Official Cannabis). Accessed Oct 5, 2026.
  6. Leafly, Forum Cut Cookies strain information. Accessed Oct 5, 2026.
  7. Weedmaps listings, compiled by Official Cannabis, Weedmaps flower menu snapshot, 27 US markets, Oct 5, 2026. Accessed Oct 5, 2026. Latest capture Oct 5, 2026.
  8. Leafly, OG Kush strain information. Accessed Oct 5, 2026.
  9. Leafly, Gelato strain information. Accessed Oct 5, 2026.
  10. Leafly, GMO Cookies strain information. Accessed Oct 5, 2026.