I corrected the issue by putting this code in to resize the mediatedAdView, still need logic to change height on rotation...but at lease I am seeing ads.
- (void)adViewDidReceiveAd:(GADBannerView *)adView {
if ([adView mediatedAdView].frame.size.width == 0.0f) {
[[adView mediatedAdView] setFrame:CGRectMake(0, 0, adView.frame.size.width, adView.frame.size.height)];
}
}
}