That's not true at all. Gravel has flat out stated that he has no hopes for winning the presidential nomination and that he is only campaigning for President so that he can get his message out.
Of course, this means that everyone can find some way that they strongly disagree with him and he has been pretty effectively marginalized and he's been excluded from some of the debates.
I know that Gravel favors:
* ending the drug war
* getting out of the oil wars in the Middle East
* oil independence "within 5 years"
* gay rights
* year round schooling???
* progressive sales tax???
*
and some other stuff
He has his own health care plan, too, of course.