I like the suggestion to simply chant (The Ramones) "Gabba Gabba Hey!", but for something more melodic it probably should be a Barry Manilow song ...
Gabbi we love you come, come,
come into our ground
Let us see some wonderful goals from you
Gabbi we want you,
now, now, now and score one fast
Could this be the magic at last?
(much better than the Take That version)