<dependency>
  <groupId>com.google.gcm</groupId>
  <artifactId>gcm-server</artifactId>
  <version>1.0.0</version>
</dependency>

implementation 'com.google.gcm:gcm-server:1.0.0'

implementation("com.google.gcm:gcm-server:1.0.0")

libraryDependencies += "com.google.gcm" % "gcm-server" % "1.0.0"

@Grapes(
  @Grab(group='com.google.gcm', module='gcm-server', version='1.0.0')
)

<dependency org="com.google.gcm" name="gcm-server" rev="1.0.0" />

[com.google.gcm/gcm-server "1.0.0"]

'com.google.gcm:gcm-server:jar:1.0.0'