Yes.
-
A UUID consists of only hexadecimal characters (a–f, 0–9) plus a hyphen (-).
-
As per RFC 3986 (URI Syntax) §2.3, hyphen and hexadecimal characters are included in those explicitly unreserved:
Characters that are allowed in a URI but do not have a reserved purpose are called unreserved. These include uppercase and lowercase letters, decimal digits, hyphen, period, underscore, and tilde.