I'm getting an error message when uploading a library

I am trying to add the Adafruit-GFX-Library.zip and I keep getting this error message: Arduino: 1.6.3 (Windows 8.1), Board: "Arduino Uno"

java.io.IOException: Zip doesn't contain a library

at processing.app.Base.handleAddLibrary(Base.java:2542)

at processing.app.Base$6.actionPerformed(Base.java:1053)

at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)

at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)

at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)

at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)

at javax.swing.AbstractButton.doClick(AbstractButton.java:376)

at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)

at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)

at java.awt.Component.processMouseEvent(Component.java:6525)

at javax.swing.JComponent.processMouseEvent(JComponent.java:3322)

at java.awt.Component.processEvent(Component.java:6290)

at java.awt.Container.processEvent(Container.java:2234)

at java.awt.Component.dispatchEventImpl(Component.java:4881)

at java.awt.Container.dispatchEventImpl(Container.java:2292)

at java.awt.Component.dispatchEvent(Component.java:4703)

at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)

at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)

at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)

at java.awt.Container.dispatchEventImpl(Container.java:2278)

at java.awt.Window.dispatchEventImpl(Window.java:2739)

at java.awt.Component.dispatchEvent(Component.java:4703)

at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751)

at java.awt.EventQueue.access$500(EventQueue.java:97)

at java.awt.EventQueue$3.run(EventQueue.java:702)

at java.awt.EventQueue$3.run(EventQueue.java:696)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)

at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)

at java.awt.EventQueue$4.run(EventQueue.java:724)

at java.awt.EventQueue$4.run(EventQueue.java:722)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:721)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Zip doesn't contain a library

This report would have more information with "Show verbose output during compilation" enabled in File > Preferences.

Even though it says

Zip doesn't contain a library

there should be no reason that it's saying that, because it works just fine on my mac. Help please?

you could instal your library manualy at documents/arduino/libraries

And unzip it.