in Sanskrit:

Om gam ganapataye namaha

In English:
Gam is the root sound of Muladhara, the root chakra - where Ganesh is said to reside

Ganapataye is another word for Ganesha

Namaha means I prostrate/I bow before you and bow to you

SO this mantra means

I bow to you Ganesha, the remover of obstacles

✨💫💛💫✨ Sara!