I get an error when installing gulp, how to fix it?

Question

gulp.js

npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: graceful-fs v3.0.0 and before will fail on node releases >= v7.0. Please update to [email protected]^4.0.0 as soon as possible. Use 'npm ls graceful-fs' to find it in the tree.
npm ERR! path /usr/local/bin/gulp
npm ERR! code EEXIST
npm ERR! Refusing to delete /usr/local/bin/gulp: ../lib/node_modules/gulp-cli/bin/gulp.js symlink target is not controlled by npm /usr/local
npm ERR! File exists: /usr/local/bin/gulp
npm ERR! Move it away, and try again.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/Larik/.npm/_logs/2017-05-03T05_16_59_008Z-debug.log