The inscription is in "CAPITAL"Letters:
si quaeris peninsulam amoenam circumspice
It is the motto of State Michigan and means: If you seek a pleasant peninsula look about you
And which logo do you mean exactly ? This:
http://upload.wikimedia.org/wikipedia/en/thumb/a/a0/Grand_Rapids_Griffins.svg/1103px-Grand_Rapids_Griffins.svg.png