GTM creation is an extensive exercise and involves a lot of time, research and market knowledge. Instead of creating a mock GTM, a framework for creating a GTM can be suggested based on in-depth product knowledge.
This GTM should include the following:
1) Target market your a looking to enter (TAM, SAM, SOM)
2) Buyer Persona
3) Messaging
4) Region X Industry X Use case mapping
5) Buyer journey mapping
6) Lead gen approach with sales funnel