Apache Groovy has inherited all of the syntax of Java. When Jeremy Rayner built the Antlr 2 based syntax for Groovy back in 2005, he began with the syntax for Java, then added the Groovy-specific grammar to it. The latest version of Groovy still uses that syntax, so if Java has syntactic baggage, then Groovy has it too.
I'm picking Groovy will still have that baggage-laden syntax for a while yet. 2 yrs ago, Daniel Sun built an Antlr 4 based replacement grammar, but the Groovy project managers at Apache are taking their sweet time in rolling it along. They even had its optional preview removed from the version 2.6 beta of Groovy.