可参见这里： npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue

你可以操作像这样：
法一： npm install -g npm
法二： npm install -g minimatch@3.0.2

myhome@myhome-PC MINGW32 /e
$ npm install -g gulp
npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated minimatch@0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated graceful-fs@1.2.3: graceful-fs v3.0.0 and before will fail o n node releases >= v7.0. Please update to graceful-fs@^4.0.0 as soon as possible . Use 'npm ls graceful-fs' to find it in the tree.
C:UsersmyhomeAppDataRoamingnpmgulp -> C:UsersmyhomeAppDataRoamingnpm node_modulesgulpbingulp.js
C:UsersmyhomeAppDataRoamingnpm
`-- gulp@3.9.1
`-- gulp-util@3.0.8

`-- through2@2.0.3
  `-- readable-stream@2.2.3

myhome@myhome-PC MINGW32 /e
$ npm install -g minimatch@3.0.2
C:UsersmyhomeAppDataRoamingnpm
`-- minimatch@3.0.2
`-- brace-expansion@1.1.6

+-- balanced-match@0.4.2
`-- concat-map@0.0.1

myhome@myhome-PC MINGW32 /e
$ gulp -v
bash: gulp: command not found