<dependency>
  <groupId>rubygems</groupId>
  <artifactId>json</artifactId>
  <version>1.8.0</version>
  <type>gem</type>
</dependency>

implementation 'rubygems:json:1.8.0'

implementation("rubygems:json:1.8.0")

libraryDependencies += "rubygems" % "json" % "1.8.0"

@Grapes(
  @Grab(group='rubygems', module='json', version='1.8.0')
)

<dependency org="rubygems" name="json" rev="1.8.0" />

[rubygems/json "1.8.0"]

'rubygems:json:jar:1.8.0'