diff --git a/src/utilities/Remotes.jl b/src/utilities/Remotes.jl
index 1a3add0f50..997d6732f6 100644
--- a/src/utilities/Remotes.jl
+++ b/src/utilities/Remotes.jl
@@ -150,6 +150,9 @@ makedocs(
 )
 ```
 
+The `host` may include a scheme. If the host does not define a scheme, it
+defaults to `https`.
+
 The single argument constructor assumes that the end user and
 repository parts are separated by a slash (e.g.,
 `JuliaDocs/Documenter.jl`).
@@ -164,7 +167,17 @@ function GitLab(remote::AbstractString)
     user, repo = split(remote, '/')
     GitLab(user, repo)
 end
-repourl(remote::GitLab) = "https://$(remote.host)/$(remote.user)/$(remote.repo)"
+function host_with_scheme(remote::GitLab)
+    # A scheme in a URI consists of a letter followed by zero or more letters,
+    # digits, pluses, dashes or periods followed by a colon. They should be
+    # matched case insensitively
+    #
+    # See https://datatracker.ietf.org/doc/html/rfc3986#section-3.1
+    scheme_matcher = r"^\p{L}[\p{L}\d+-.]*:"
+    scheme_from_host = match(scheme_matcher, remote.host)
+    return isnothing(scheme_from_host) ? "https://$(remote.host)" : remote.host
+end
+repourl(remote::GitLab) = "$(host_with_scheme(remote))/$(remote.user)/$(remote.repo)"
 function fileurl(remote::GitLab, ref::AbstractString, filename::AbstractString, linerange)
     url = "$(repourl(remote))/-/tree/$(ref)/$(filename)"
     isnothing(linerange) && return url
diff --git a/test/remotes.jl b/test/remotes.jl
index c3ee9fa30f..2ebafa58c4 100644
--- a/test/remotes.jl
+++ b/test/remotes.jl
@@ -87,6 +87,15 @@ using .Remotes: repofile, repourl, issueurl, URL, GitHub, GitLab
         @test issueurl(r, "123") == "https://my-gitlab.com/JuliaDocs/Documenter.jl/-/issues/123"
     end
 
+    let r = GitLab("http://my-gitlab.com", "JuliaDocs", "Documenter.jl")
+        @test repourl(r) == "http://my-gitlab.com/JuliaDocs/Documenter.jl"
+        @test repofile(r, "mybranch", "src/foo.jl") == "http://my-gitlab.com/JuliaDocs/Documenter.jl/-/tree/mybranch/src/foo.jl"
+        @test repofile(r, "mybranch", "src/foo.jl", 5) == "http://my-gitlab.com/JuliaDocs/Documenter.jl/-/tree/mybranch/src/foo.jl#L5"
+        @test repofile(r, "mybranch", "src/foo.jl", 5:5) == "http://my-gitlab.com/JuliaDocs/Documenter.jl/-/tree/mybranch/src/foo.jl#L5"
+        @test repofile(r, "mybranch", "src/foo.jl", 5:8) == "http://my-gitlab.com/JuliaDocs/Documenter.jl/-/tree/mybranch/src/foo.jl#L5-L8"
+        @test issueurl(r, "123") == "http://my-gitlab.com/JuliaDocs/Documenter.jl/-/issues/123"
+    end
+
     let r = GitLab("JuliaDocs/Documenter.jl")
         @test repourl(r) == "https://gitlab.com/JuliaDocs/Documenter.jl"
         @test repofile(r, "mybranch", "src/foo.jl") == "https://gitlab.com/JuliaDocs/Documenter.jl/-/tree/mybranch/src/foo.jl"