Yes internal medicine doctors do gynecology.
Internal medicine doctors focus on the entire body of the adult body and can do most of the medical needs that an adult needs.
A family physician or physician in general focuses on both adults, teens and children.
There are also other doctors known as gynecologists that focus solely on gynecology so sometimes the internal medicine doctor may refer you to a gynecologist to have the gynecology done.
But in some places the internal medicine doctor may be the one to do the gynecology visit and checkup.