Spokane’s most trusted cannabis testing laboratory

GGL is the lab that growers in Eastern Washington turn to for fast reliable cannabis testing. We get your product to market faster. GGL was built from the ground up to provide industrial growers and processors with efficient, state mandated testing. We serve the entire Eastern Washington region. Call or email GGL today to learn more about our services.

GGL is fully up to date with the new I-502 Testing Requirements and certified in screening for Mycotoxins. Now testing all 502 pesticides listed by the LCB

Potency Testing

We offer potency tests for THC, THC-A, CBD and total Cannabinoid content.

Get Testing Results Faster

Stop sending your cannabis out of town to get it tested! We offer LOCAL testing for Spokane growers. Get your results online. Notifications available via text and email.

Full Service Lab

We can also do testing for residual solvents and microbial.


  • Local testing
  • Text when tests are ready for viewing
  • Personal log in for results
  • Competitive pricing