"The both of them, yes. I would they could meet." Another admission, but it's very easy to admit things in front of Magnus's easy sympathy. Claudius wishes he could tell Gertrude a story about the beautiful boy he met and fell in love with -- but he can't ever return to his own world. His role in that story that ends in her death. Somehow it's safer to imagine Galahad and Gertrude meeting, unlikely as it is¹. "Galahad sets me at ease even when he himself is uneasy. We share something, a kindred feeling, so I could sit quietly with him in a raucous hall and feel reassured by him. When I was younger and clumsier in conversation, Gertrude would share such comfortable silences with me. She's perceptive, insightful, and she has that welcoming way about her. She'd see Galahad's virtues -- which you know are many -- and understand how to speak with him." And speaking with Galahad is a worthwhile, precious gift. Naturally Claudius would want it for someone he loves.

¹ This is a shameless use of the dramatic irony lever.