There's a bit of ceremony but similar to how you can interface with Java libraries from Clojure you can pull in Erlang when Gleam isn't enough.

You can do some code shortening with use, https://erikarow.land/notes/using-use-gleam, but it will likely always be rather chatty and won't support metaprogramming: https://lpil.uk/blog/how-to-add-metaprogramming-to-gleam/