He is related to the X-Men comics in some way, and he wears mostly white. He has a mask that covers everything except for his eyes and the space between them and has telepathy. I think he also carries two guns.
Probably you are thinking of Fantomex, who was introduced during Grant Morrison's run as an X-Men writer. (Which I happened to be buying at the time.) The Wikipedia article on Fantomex says that he debuted in New X-Men #128, published in 2002.
- Wears a mostly-white outfit?
- A mask that covers most of his head, but leaves the bit around his eyes uncovered?
- Carries handguns?
Well, he can generate powerful illusions, and he is essentially immune to other people's telepathy, but he doesn't seem to be a true-blue telepath himself. (I suspect your memory blurred a few details. Or perhaps you have read a comic book story written by somebody who thought Fantomex did, in fact, have some telepathy in his bag of tricks?)