diff --git a/cmd/gb.go b/cmd/gb.go
new file mode 100644
index 0000000..0cf173a
--- /dev/null
+++ b/cmd/gb.go
@@ -0,0 +1,77 @@
+package cmd
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+
+	"github.com/Masterminds/glide/gb"
+)
+
+func HasGbManifest(c cookoo.Context, p *cookoo.Params) (interface{}, cookoo.Interrupt) {
+	dir := cookoo.GetString("dir", "", p)
+	path := filepath.Join(dir, "vendor/manifest")
+	_, err := os.Stat(path)
+	return err == nil, nil
+}
+
+// GbManifest
+//
+// Params:
+// 	- dir (string): The directory where the manifest file is located.
+// Returns:
+//
+func GbManifest(c cookoo.Context, p *cookoo.Params) (interface{}, cookoo.Interrupt) {
+	dir := cookoo.GetString("dir", ".", p)
+	return parseGbManifest(dir)
+}
+
+func parseGbManifest(dir string) ([]*Dependency, error) {
+	path := filepath.Join(dir, "vendor/manifest")
+	if fi, err := os.Stat(path); err != nil || fi.IsDir() {
+		return []*Dependency{}, nil
+	}
+
+	Info("Found GB manifest file.\n")
+	buf := []*Dependency{}
+	file, err := os.Open(path)
+	if err != nil {
+		return buf, err
+	}
+	defer file.Close()
+
+	man := gb.Manifest{}
+
+	dec := json.NewDecoder(file)
+	if err := json.Decode(&man); err != nil {
+		return buf, err
+	}
+
+	seen := map[string]bool{}
+
+	for _, d := range man.Dependencies {
+		pkg, sub := NormalizeName(d.Importpath)
+		if _, ok := seen[pkg]; ok {
+			if len(sub) == 0 {
+				continue
+			}
+			for _, dep := range buf {
+				if dep.Name == pkg {
+					dep.Subpackages = append(dep.Subpackages, sub)
+				}
+			}
+		} else {
+			seen[pkg] = true
+			dep := &Dependency{
+				Name:       pkg,
+				Reference:  d.Revision,
+				Repository: d.Repository,
+			}
+			if len(sub) > 0 {
+				d.Subpackages = []string{sub}
+			}
+			buf = append(buf, dep)
+		}
+	}
+	return buf, nil
+}
diff --git a/gb/manifest.go b/gb/manifest.go
new file mode 100644
index 0000000..8d57356
--- /dev/null
+++ b/gb/manifest.go
@@ -0,0 +1,19 @@
+// Package gb provides compatibility with GB manifests.
+package gb
+
+// This is lifted wholesale from GB's `vendor/manifest.go` file.
+//
+// gb's license is MIT-style.
+
+type Manifest struct {
+	Version      int          `json:"version"`
+	Dependencies []Dependency `json:"dependencies"`
+}
+
+type Dependency struct {
+	Importpath string `json:"importpath"`
+	Repository string `json:"repository"`
+	Revision   string `json:"revision"`
+	Branch     string `json:"branch"`
+	Path       string `json:"path,omitempty"`
+}