Yes, senior citizens who own a car and have a valid driving license can also get gas vouchers and gas money from national churches or government programs. The NET program is especially helpful in these cases, as it specifically provides gas money for using it in doctor’s appointments and other health checkups.
Other programs of the Salvation army also provide benefits to senior citizens. Also, no scheme for gas vouchers specifically excludes senior citizens, so it is assumed that they are eligible for it.
If you are applying for programs or grants that are specially meant for senior citizens, you need to show proof of the same. Otherwise, there is no such requirement.