I don't think there is such a chapter existing. We see Red at Mt. Silver once but the only one who visits him is Sabrina, not Gold!^^ And at te end of the G/S/C arc, Gold asks Red to train him at Mt. Silver (to escape a pretty embarrising situation!^^) but we don't see what they're doing there cuz, well, it's the end of Gold's story!^^ Who knows, maybe in the HG/SS arc but I don't think that'll happen cuz Hidenori (Pokespe's storywriter) always makes a whole new story when the edition Nintendo released is a remake (proof: FR/LG arc) ^^
Or are you talking about a different manga (not Pokemon Adventures) ?