Formal:
* Goa-chea bhavanachi swagata (गोवा-च्या भवनाची स्वागता)
* This literally translates to "Welcome to the abode of Goa"
Informal:
* Goa-nt tumcha aavkar (गोवा-ंत तुमचा आवाकार)
* This means "Welcome to Goa" more directly
Another option:
* Goa-nt tumkam aavkar (गोवा-ंत तुमकां आवाकार)
* This is also informal and means "Welcome to Goa"
Note: "Goa-nt" can also be replaced with "Goa-har" (गोवा-हार) for a slightly more elegant tone.